Graft prosthesis devices containing renal capsule collagen

a technology of renal capsule and graft prosthesis, which is applied in the direction of prosthesis, blood vessels, impression caps, etc., can solve the problems of complicated preparatory process and risk of disruption of the native structure of extracellular components

Inactive Publication Date: 2006-08-08
COOK BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]Another object of the invention is to provide new extracellular m

Problems solved by technology

The isolation step generally involves either a de-lamination or a cell dissociation, which complicates t

Method used

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  • Graft prosthesis devices containing renal capsule collagen
  • Graft prosthesis devices containing renal capsule collagen

Examples

Experimental program
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Effect test

example 1

[0073]The tissue graft material of this invention is prepared in accordance with the following steps:[0074]Kidneys including the renal capsule of freshly slaughtered adult pigs are obtained and stored on ice prior to treatment at the laboratory. The capsule is fairly loose, but is attached to the kidney at discrete locations. The fatty tissue that is attached to the capsular tissue is first removed with a blunt dissecting instrument. A single slit is made in the capsule along the long axis of the kidney through the renal pelvis and the attachments between the kidney and the capsule are clipped and the capsule is peeled away from the kidney. Any remaining fatty tissues which are still attached to the capsules are carefully removed. The isolated capsule is semi-translucent.

[0075]The isolated capsule is rinsed several times with sterile water and then disinfected by submerging it in an aqueous ethanol peracetic acid solution for two hours and under vigorous agitation. The peracetic aci...

example 2

[0078]Samples of the purified tissue as prepared in Example 1 are stained using Gomori's Trichome stain. It is found that the material is primarily collagenous.

example 3

[0079]Samples of the purified tissue as prepared in Example 1 are stained using Verhoff's stain. Histological study reveals a presence of elastic fibers in the purified renal capsule tissue which is indicative of isolated renal capsule and separation from the surrounding mesenteric tissues.

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Abstract

The invention provides tissue graft compositions comprising collagen-based extracellular matrices derived from renal capsules of warm-blooded vertebrates. The invention further provides a process of harvesting and purifying a renal capsule to provide an extracellular matrix material having beneficial use as a tissue graft and/or cell growth material.

Description

REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of U.S. Provisional Patent Application, Ser. No. 60 / 301,671 entitled GRAFT PROSTHESIS DEVICES CONTAINING RENAL CAPSULE COLLAGEN filed Jun. 28, 2001, which is hereby incorporated by reference herein in its entirety.FIELD OF THE INVENTION[0002]The present invention relates generally to graft prosthesis devices, and more particularly to such devices comprising collagen derived from extracellular matrices.BACKGROUND OF THE INVENTION[0003]Tissue graft materials have attained considerable clinical and economic significance today. It is now well known that collagen-based extracellular matrices (ECMs) derived from warm-blooded vertebrates can be used advantageously as tissue grafts materials. See U.S. Pat. Nos. 4,902,508 and 5,281,422, and International Publication Nos. WO 98 / 25636 and WO 98 / 22158. It has been found that collagen-based ECMs can serve as a scaffold on which animal tissues may grow. It has been also fou...

Claims

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Application Information

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IPC IPC(8): A61F2/02A61L27/00A61F2/00A61L26/00A61L27/24A61L27/36
CPCA61L26/0033A61L26/0057A61L27/3633A61L27/3604A61L27/24
Inventor PATEL, UMESH H.HILES, MICHAEL C.HODDE, JASON P.
Owner COOK BIOTECH
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